Water heater



FIG. 1 is a front view of a water heater of the present design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a perspective view showing front, top plan and right side thereof;

FIG. 8 is a perspective view showing rear, top plan and left side thereof;

FIG. 9 is a perspective view showing front, bottom plan and right side thereof;

FIG. 10 is a perspective view showing rear, bottom plan and left side thereof;

FIG. 11 is an enlarged front view of the portion 11-11 of FIG. 1 thereof;

FIG. 12 is a cross sectional view of the portion taken along line 12-12 of FIG. 1 thereof;

FIG. 13 is a cross sectional view of the portion taken along line 13-13 of FIG. 11 thereof;

FIG. 14 is a cross sectional view of the portion taken along line 14-14 of FIG. 11 thereof; and,

FIG. 15 is a cross sectional view of the portion taken along line 15-15 of FIG. 11 thereof. 

CLAIM The ornamental design for a water heater, as shown. 